<?php

namespace PSX\Schema\Generator;

use PSX\Schema\Generator\Type\GeneratorInterface;
use PSX\Schema\Type\ReferenceType;
use PSX\Schema\Type\StructType;
use PSX\Schema\Type\TypeAbstract;

/**
 * Ruby
 *
 * @author  Christoph Kappestein <christoph.kappestein@gmail.com>
 * @license http://www.apache.org/licenses/LICENSE-2.0
 * @link    http://phpsx.org
 */
class Ruby extends CodeGeneratorAbstract
{
    /**
     * @inheritDoc
     */
    public function getFileName(string $file): string
    {
        return $file . '.rb';
    }

    /**
     * @inheritDoc
     */
    protected function newTypeGenerator(array $mapping): GeneratorInterface
    {
        return new Type\Ruby($mapping);
    }

    /**
     * @inheritDoc
     */
    protected function writeStruct(
        string $name,
        array $properties,
        ?string $extends,
        ?array $generics,
        StructType $origin,
    ): string {
        $code = 'class ' . $name . "\n";

        if (!empty($extends)) {
            $code.= $this->indent . 'extend ' . $extends . "\n";
        }

        $attr = [];
        $items = [];
        foreach ($properties as $name => $property) {
            /** @var Code\Property $property */
            $attr[] = ':' . $name;
            $items[] = $name;
        }

        if (!empty($attr)) {
            $code.= $this->indent . 'attr_accessor ' . implode(', ', $attr) . "\n";
        }

        $code.= "\n";

        $code.= $this->indent . 'def initialize(' . implode(', ', $items) . ')' . "\n";
        foreach ($items as $item) {
            $code.= $this->indent . $this->indent . '@' . $item . ' = ' . $item . "\n";
        }
        $code.= $this->indent . 'end' . "\n";

        $code.= 'end' . "\n";

        return $code;
    }

    protected function writeReference(string $name, string $type, ReferenceType $origin): string
    {
        $code = 'class ' . $name . "\n";
        $code.= $this->indent . 'extend ' . $type . "\n";
        $code.= 'end' . "\n";

        return $code;
    }

    protected function writeHeader(TypeAbstract $origin): string
    {
        $code = '';

        if (!empty($this->namespace)) {
            $code.= 'module ' . $this->namespace . "\n";
            $code.= "\n";
        }

        $comment = $origin->getDescription();
        if (!empty($comment)) {
            $code.= '# ' . $comment . "\n";
        }

        return $code;
    }

    protected function writeFooter(TypeAbstract $origin): string
    {
        $code = '';

        if (!empty($this->namespace)) {
            $code.= 'end' . "\n";
        }

        return $code;
    }
}
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